Control knob



FIG. 1 is a perspective view of a control knob showing my new design;

FIG. 2 is a right side view, the left side being a mirror image thereof;

FIG. 3 is a top view, the bottom being a mirror image thereof;

FIG. 4 is a front view;

FIG. 5 is a rear view;

FIG. 6 is a perspective view of a second embodiment of the design ofFIG. 1;

FIG. 7 is a right side view of FIG. 6, the left side being a mirrorimage thereof;

FIG. 8 is a top plan view of FIG. 6; the bottom being a mirror imagethereof;

FIG. 9 is a front view of FIG. 6; and

FIG. 10 is a rear view of FIG. 6.

The ornamental design for a control knob, as shown and described.